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Contents
require 'glimmer/dsl/expression'
module Glimmer
module DSL
module Opal
class WidgetListenerExpression < Expression
def can_interpret?(parent, keyword, *args, &block)
Glimmer::Config.logger.debug {"keyword starts with on_: #{keyword.start_with?('on_')}"}
return false unless keyword.start_with?('on_')
# TODO activate the following lines and test them
# widget_or_display_parentage = parent.respond_to?(:swt_widget) || parent.is_a?(Glimmer::SWT::DisplayProxy)
# Glimmer::Config.logger.debug {"parent #{parent} is a widget or display: #{widget_or_display_parentage}"}
# return false unless widget_or_display_parentage
# Glimmer::Config.logger.debug {"block exists?: #{!block.nil?}"}
# raise Glimmer::Error, "Listener is missing block for keyword: #{keyword}" unless block_given?
# Glimmer::Config.logger.debug {"args are empty?: #{args.empty?}"}
# raise Glimmer::Error, "Invalid listener arguments for keyword: #{keyword}(#{args})" unless args.empty?
# result = parent.can_handle_observation_request?(keyword)
# Glimmer::Config.logger.debug {"can add listener? #{result}"}
# raise Glimmer::Error, "Invalid listener keyword: #{keyword}" unless result
true
end
def interpret(parent, keyword, *args, &block)
parent.handle_observation_request(keyword, block)
end
end
end
end
end
Version data entries
43 entries across 43 versions & 1 rubygems